Earn, a new investment product from 1inch, a decentralised exchange (DEX) aggregator, has been launched. Earn is a collection of liquidity pools optimised for stablecoin swaps, according to a release published with The Block. A liquidity pool is a collection of cryptocurrencies such as ether (ETH) and stablecoins such as tether (USDT) that are locked in a smart contract and managed by automated market makers (AMM).